This caused me to take all my current extension usage seriously.
I went and looked for the source code of all my installed extensions.

Surprisingly, I found out that most of the extensions do not give a link
to a github or a source code file.
I still could go over and check the plugin's code itself since the extensions
are all required to be open source, but this won't be possible for everyone.
Moreover, it is a hassle to have to do it for every extension you would want to install.

So I decided I would only use the extensions that have their code available
and rest of them I'd write them myself and make them open source on
github for all to see.

This way extensions are safe, available for thorough dive into the code if one
so desires.